Form clamp



Feb. 18, 1930. H, H, LAMPERT 1,747,779

FORM CLAMP Filed April 25, 1928 HHM (3 90 fg/ 1 Patented Feb. 18, 1930 STATS HENRY H. LAMPERT, or CHICAGO, ILLrNors FORM CLAMP Application led April 23,

rIhe main objects of this invention are to provide an improved form of mold construction particularly adapted for use in the construction of concrete beams; to provide an improved form ot clamp for supporting the mold sections and for detachably securing the wall sections to the solht section; to provide a mold clamp having improved means for attachment to a form tie; and to provide an improved clamp of this kindwhich is adjustable so as to be adapted to accommodate molds of diiterent'sizes.

An illustrative embodiment of this invention is shown in the accompanying drawing, in which Iligure l is a transverse vertical section of v a beam mold showing improved supporting and clamping means applied thereto.

F ig. 2 is a bottom plan of the same.

Fig.. 3 is a top plan of the same, on a reduced scale.

Fig. l is a detail in perspective of the clamping means.

In the form shown, the improved clamp is anplied to a mold comprising a solit section 1 and a pair of side wall sections 2.

The sofit section 1 is spaced from the bottom of a structural shape 3 by a plurality of spacers l having prongs 5 which are driven into the soiiit. 1

The wall sections 2 are usually made of planks strengthened by spaced upright cleats 6. y

In the construction shown, the improved clamp comprises a beam 7 and a pair of jaws 8 adjustably mounted thereon in position to embrace the lower part of the mold.

The beam 7 preferably comprises a channel iron including a. web 9 and depending ianges 10. The web 9 forms a supporting sheltl for the mold and is provided with a plurality of transversely disposed spaced slots 11 formed therein for receiving the bight of a form tie 12.

The form tie 12 is arranged to form a supporting sling having its bight looped around a portion of the beam 7. The tie 12 extends between the wall sections 6 and the edges of the softit 1 or, if desired, it may pass through apertures, not shown, formed in the solit sec- 192s. serial No. 272,108.

tion. The ends of the tie band are secured tothe structural shape 3 by clamps 13; i

-The channel beam 7 may be temporarily fastened to the soiiit section 1V by nails 14 eX- tending through certain of the slots 11.

In the construction shown, the jaws 8 comprise channel bars having webs 15 and flanges 1G. Formed in the webs 15, are slots 17 for receiving fastening bolts 18 provided with Wing nuts 19.

The bolts 18 may be seated in any of the slots 11 for adjustably securing the jaws 8 to the beam 7. The jaws 8 may thereby be moved toward and away from each other for accommodating molds of ditterent sizes.

It the 8 is directly opposite a cleat 6, the jaw is shifted inwardly to bring its inner flange 16 into engagement with the cleat as shown at the right of Fig. l. It the jaw is not opposite a cleat, a kicker strip 20 is 70 placed between the cleats 6 and the jaw, as shown at the lett of Fig. 1.

In operation, the beam 7 is nailed to the bottom of the soHit section and the tie element 12 is then looped around the sotlit 1 and a 75 portion of the beam 7. The slots 11 permit the clamp to accommodate soliits of dill'erent widths.

After the tie band has been secured to the structural shape 3, the wall sections 2 are 80 placed on the beam 7 and detachably secured to the sotlit 1 by the jaws 8.

Although but one specific embodiment of this invention has been herein shown and described, it will be understood that numerous 85 details of the construction shown may be al tered or omitted without departing from the snirit of this invention as delined by the following claims.

I claim:

1. In a device of the class described, a clamp comprising a channel-shaped beam adapted to support mold sections and having a plurality of apertures formed in the web thereof at substantially regular intervals, a form tie arranged to form a supporting sling having its bight looped around a portion of saidbeam within the channel and extending through certain of said apertures, a pair of jaws supported on said beam for engaging the mold sections, and a bolt seated in one of the other apertures for adjustably securing one of said jaws to said beam.

2. In a device of the class described, a 5 clamp comprising a channel shaped beam adapted to support mold sections and having a plurality of apertures formed in the web thereof and spaced apart longitudinally thereof for receiving a form tie, a pair of 'jaws supported on the web of said beam for engaging the mold sections, and a pair of bolts seated in two of said apertures for adjustably securing said jaws to said beam; the heads of said bolts being located within the channel.

Signed at Chicago this th day of April HENRY H. LAMPERT. 

